From 5b6444103c65f943f62c78b8585bde1bf3704adc Mon Sep 17 00:00:00 2001
From: Vincenzo Eduardo Padulano <v.e.padulano@gmail.com>
Date: Mon, 24 Jun 2024 09:38:13 +0200
Subject: [PATCH] Prevent slowdown in yum due to high file descriptor count

---
 conda_smithy/templates/build_steps.sh.tmpl |  5 +++++
 news/1958_yum_fix_ulimit.rst               | 26 ++++++++++++++++++++++
 2 files changed, 31 insertions(+)
 create mode 100644 news/1958_yum_fix_ulimit.rst

diff --git a/conda_smithy/templates/build_steps.sh.tmpl b/conda_smithy/templates/build_steps.sh.tmpl
index 93fb76eef..a5d0f3097 100644
--- a/conda_smithy/templates/build_steps.sh.tmpl
+++ b/conda_smithy/templates/build_steps.sh.tmpl
@@ -21,6 +21,11 @@ export RECIPE_ROOT="${RECIPE_ROOT:-/home/conda/recipe_root}"
 export CI_SUPPORT="${FEEDSTOCK_ROOT}/.ci_support"
 export CONFIG_FILE="${CI_SUPPORT}/${CONFIG}.yaml"
 
+# Due to https://bugzilla.redhat.com/show_bug.cgi?id=1537564 old versions of rpm
+# are drastically slowed down when the number of file descriptors is very high.
+# This can be visible during a `yum install` step of a feedstock build.
+ulimit -n 1024
+
 cat >~/.condarc <<CONDARC
 
 conda-build:
diff --git a/news/1958_yum_fix_ulimit.rst b/news/1958_yum_fix_ulimit.rst
new file mode 100644
index 000000000..e4a87d8bc
--- /dev/null
+++ b/news/1958_yum_fix_ulimit.rst
@@ -0,0 +1,26 @@
+**Added:**
+
+* <news item>
+
+**Changed:**
+
+* Changed the build_steps.sh template so that it sets the number of maximum file
+  descriptors to 1024. This is done to mitigate a bug in old rpm versions (such
+  as the one shipped with the Centos7 container) that cause the yum install step
+  to take tremendously longer than necessary.
+
+**Deprecated:**
+
+* <news item>
+
+**Removed:**
+
+* <news item>
+
+**Fixed:**
+
+* <news item>
+
+**Security:**
+
+* <news item>